Mouth wash nozzle structure of pulse water flow oral irrigator

Abstract

The utility model relates to a mouth wash nozzle structure of a pulse water flow oral irrigator, the mouth wash nozzle structure of the pulse water flow oral irrigator comprises a connecting pipe with a water inlet and a water spraying pipe with a water outlet which are connected in sequence, and one end of the water spraying pipe close to the connecting pipe is provided with a water-passing sinking hole channel. A protruding part is arranged on the side, close to one end of the connecting pipe, of the water spraying pipe, an isolation cavity used for containing a mouthwash concentrated body is formed in the protruding part, a first water passing hole communicated with the isolation cavity and the water passing sinking hole channel is formed in the pipe wall of the water spraying pipe, and one end, close to the water spraying pipe, of the connecting pipe extends into the water passing sinking hole channel. And the depth of the connecting pipe extending into the water-passing sinking hole channel is adjustable, so that a second water-passing hole formed in the pipe wall of the connecting pipe is communicated with or disconnected from the first water-passing hole. The mouthwash nozzle of the pulse water flow oral irrigator is reasonable in structural design, and clear water output or mixed output of mouthwash and clear water can be switched according to use requirements.

Description

Technical Field:

[0002] The utility model relates to a dental irrigator product, in particular to a structure of a mouthwash nozzle for a pulsed water flow dental irrigator and a pulsed water flow dental irrigator. Background Art:

[0004] Mouthwash can keep the breath fresh, eliminate bacteria causing bad breath, prevent and treat dental and oral diseases, and enhance oral health.

[0005] The applicant applied for "A Structure of a Nozzle for a Dental Irrigator for Ejecting Mouthwash and Its Working Method" on December 29, 2023, with the publication number CN117598806A. It is preferably used in a dental irrigator without pulsed water flow, such as the water flow from tap water. However, for a general dental irrigator to have a good rinsing effect, the water flow generated by the water pump is a pulsed water flow of 17 - 30 Hz. For the pulsed water flow, in the product of the aforementioned invention patent application, since there is always at least one hole communicating with the mouthwash concentrate (mouthwash ball), when it is desired to rinse with clean water, mouthwash still comes out from this hole, and it is impossible to switch to rinsing with clean water. Summary of the Invention:

[0007] In view of the deficiencies of the prior art, the purpose of the present utility model is to provide a structure of a mouthwash nozzle for a pulsed water flow dental irrigator and its working method. The structure of the mouthwash nozzle of the pulsed water flow dental irrigator is reasonably designed and is conducive to switching to output clean water or a mixture of mouthwash and clean water according to the usage needs.

[0008] The structure of the mouthwash nozzle of the pulsed water flow dental irrigator of the present utility model is characterized in that: it includes a spray pipe with a water inlet end and a water outlet. There is a protruding part on the side of the spray pipe near the water inlet end. An isolation cavity for accommodating the mouthwash concentrate is provided inside the protruding part. A first water passing hole communicating the isolation cavity with the water inlet end is provided on the pipe wall of the spray pipe. When pulsed clean water is introduced into the water inlet end, when the pulsed clean water is in the high - pressure wave band, the pulsed clean water is poured into the isolation cavity through the first water passing hole and dissolves the mouthwash concentrate to form mouthwash concentrate solution. When the pulsed clean water is in the low - pressure wave band, the relatively high pressure inside the isolation cavity drives the mouthwash concentrate solution to be diluted with the pulsed clean water through the first water passing hole and then jointly output from the water outlet of the spray pipe.

[0009] Preferably, a water-passing sunken channel is provided at the water inlet end of the above-mentioned water spray pipe. The first end of the connecting pipe is inserted into the water-passing sunken channel, and the depth of the connecting pipe extending into the water-passing sunken channel is adjustable. The second end of the connecting pipe has a water inlet (for connecting with the pulsed water dental irrigator) for accessing pulsed water. Second water-passing holes are provided on the pipe wall of the connecting pipe. When the depth of the connecting pipe extending into the water-passing sunken channel is different, the second water-passing holes provided on the pipe wall of the connecting pipe can be communicated with or disconnected from the first water-passing holes; when the connecting pipe extends into the water-passing sunken channel to a first depth, the second water-passing holes provided on the pipe wall of the connecting pipe can be connected to the first water-passing holes. When pulsed clear water is introduced into the water inlet of the connecting pipe and the pulsed clear water is in the high-pressure band, the pulsed clear water is poured into the isolation cavity through the second water-passing holes and the first water-passing holes and dissolves the concentrated mouthwash to form a concentrated mouthwash solution. When the pulsed clear water is in the low-pressure band, the relatively high pressure in the isolation cavity drives the concentrated mouthwash solution to be diluted with the pulsed clear water through the first water-passing holes and the second water-passing holes and then jointly output from the water outlet of the water spray pipe; when the connecting pipe extends to other depths, the second water-passing holes provided on the pipe wall of the connecting pipe are misaligned and not communicated with the first water-passing holes, and the pulsed clear water introduced into the water inlet of the connecting pipe directly leads to the water spray pipe and is output from the water outlet.

[0010] Preferably, a gear position is provided between the above-mentioned water spray pipe and the connecting pipe when the second water-passing holes are communicated with the first water-passing holes.

[0011] Preferably, a relatively fixed elastic cover buckle is sleeved on the port of the above-mentioned water spray pipe near the connecting pipe. The elastic cover buckle includes an integrally formed pipe section and a cover plate section. An annular flange is provided on the outer peripheral wall of the water spray pipe. An annular groove for limit cooperation with the annular flange is provided on the inner peripheral wall of the pipe section. The cooperation between the annular flange and the annular groove realizes the axial relative fixation of the water spray pipe and the elastic cover buckle; a through hole for the connecting pipe to pass through is provided on the cover plate section. A plurality of slotted holes are evenly distributed on the elastic cover buckle, and the slotted holes penetrate from the middle of the pipe section to the through hole all the way, so that the elastic cover buckle forms a plurality of elastic buckle plates in the circumferential direction. A first annular limit groove is provided on the outer peripheral wall of the connecting pipe. One end of the elastic buckle plate close to the through hole can be buckled into the first annular limit groove. When one end of the elastic buckle plate close to the through hole is buckled into the first annular limit groove, the second water-passing holes are connected to the first water-passing holes.

[0012] Preferably, a second annular limit groove is provided on the outer peripheral wall of the above-mentioned connecting pipe. When one end of the elastic buckle plate close to the through hole is buckled into the second annular limit groove, the second water-passing holes are axially misaligned and not communicated with the first water-passing holes.

[0013] Preferably, an inclined conical surface is provided between the first annular limit groove and the second annular limit groove.

[0014] Preferably, a convex ring is provided on the side of the above-mentioned connecting pipe close to the second annular limit groove, and a rounded corner is provided on the outer periphery of the connection position of the pipe section and the cover plate section.

[0015] Preferably, a plurality of sealing rings are provided on both sides of the connecting pipe located at the second water passing hole.

[0016] Preferably, the above-mentioned concentrated mouthwash is a block-shaped, gel-shaped or paste-shaped concentrated mouthwash.

[0017] Preferably, the first water passing hole is a single hole and is conical in shape, with the side close to the isolation cavity being the large end.

[0018] Preferably, guiding convex strips matching the slots are provided on the outer peripheral wall of the connecting pipe to limit and guide the synchronous axial sliding of the elastic cover and the water spraying pipe.

[0019] The pulse water flosser of the present utility model uses the mouthwash spraying head structure described above, and the water inlet end of the water spraying pipe or the water inlet of the connecting pipe is connected to the water outlet end of the water outlet seat of the pulse water flosser.

[0020] The working method of the mouthwash spraying head structure of the pulse water flosser of the present utility model is characterized in that: when the user needs to output diluted mouthwash at the water outlet of the water spraying pipe, the depth of the connecting pipe extending into the water passing sunken channel is adjusted. When the connecting pipe extends into the water passing sunken channel to the first depth, the second water passing hole provided on the pipe wall of the connecting pipe is communicated with the first water passing hole. When pulsed clean water is introduced into the water inlet of the connecting pipe, when the pulsed clean water is in the high-pressure wave band, the pulsed clean water is poured into the isolation cavity through the second water passing hole and the first water passing hole and dissolves the concentrated mouthwash to form a concentrated mouthwash solution. When the pulsed clean water is in the low-pressure wave band, the relatively high pressure in the isolation cavity drives the concentrated mouthwash solution to pass through the first water passing hole and the second water passing hole and is diluted with the pulsed clean water and then jointly output from the water outlet of the water spraying pipe; when the user needs to output clean water at the water outlet of the water spraying pipe, the depth of the connecting pipe extending into the water passing sunken channel is adjusted so that the second water passing hole provided on the pipe wall of the connecting pipe is axially misaligned and not communicated with the first water passing hole, and the pulsed clean water introduced into the water inlet of the connecting pipe directly leads to the water spraying pipe and is output from the water outlet.

[0021] The mouthwash spraying head structure of the pulse water flosser of the present utility model is reasonably designed, which is beneficial to switching to clean water output or mixed output of mouthwash and clean water according to the use needs in view of the characteristics of high and low changes in the water pressure of the pulsed water. Description of the drawings:

[0023] Figure 1 is a three-dimensional view of the first embodiment of the mouthwash spraying head structure of the present utility model;

[0024] Figure 2 is a three-dimensional view of the second embodiment of the mouthwash spraying head structure of the present utility model;

[0025] Figure 3 is Figure 2 sectional view of;

[0026] Figure 4 is Figure 3 a partial view of;

[0027] Figure 5 is Figure 4 an exploded view of;

[0028] Figure 6 is an exploded view of the structure of the mouthwash nozzle of the present utility model;

[0029] Figure 7 and 8 is a three-dimensional view of the elastic cover buckle;

[0030] Figure 9 is a pulsed water pressure diagram output by the pulsed water flow oral irrigator;

[0031] Figure 10 is a three-dimensional view of the connection between the structure of the mouthwash nozzle of the present utility model and the pulsed water flow oral irrigator;

[0032] Figure 11 is a three-dimensional view of the movement of the pulsed water flow oral irrigator of the present utility model;

[0033] Figure 12 is a three-dimensional view of the internal structure of the movement of the pulsed water flow oral irrigator of the present utility model;

[0034] Figure 13 is a schematic diagram of a partial structure of the movement of the pulsed water flow oral irrigator of the present utility model;

[0035] Figure 14 is Figure 13 a longitudinal sectional view of;

[0036] Figure 15 is Figure 14 a transverse sectional view of. Specific embodiments:

[0038] The method of the present utility model will be further described in detail below in conjunction with embodiments. It should be particularly noted that the protection scope of the present utility model should include but not be limited to the technical content disclosed in this embodiment.

[0039] The first embodiment:

[0040] The structure of the mouthwash nozzle of the pulse water flow dental irrigator of the present utility model includes a water spray pipe A4 having a water inlet end A01 and a water outlet A3. A protruding portion A6 is provided on the side of the water spray pipe A4 near the water inlet end. The protruding portion A6 can be a hemispherical shell or a cylindrical shell, etc., and it can be connected and fixed to the side of the water spray pipe A4 by threading or interference fit. An isolation cavity A8 for accommodating a mouthwash concentrate A7 is provided inside the protruding portion A6. A first water passing hole A9 (preferably only one hole, and the cross-section of the first water passing hole A9 can be circular, strip-shaped, rectangular, etc.) communicating the isolation cavity A8 with the water inlet end A01 is provided on the pipe wall of the water spray pipe A4. When pulsed clean water is introduced into the water inlet end (the pulsed water is realized by the pulsed water flow dental irrigator connected to the water inlet end, and the pulsed water flow has a frequency of 17 - 30 Hz), when the pulsed clean water is in the high-pressure band (the pressure of the pulsed water is in a sine wave shape as shown in the figure), the pulsed clean water is poured into the isolation cavity through the first water passing hole and dissolves the mouthwash concentrate to form a mouthwash concentrate solution. When the pulsed clean water is in the low-pressure band, the relatively high pressure in the isolation cavity drives the mouthwash concentrate solution to be diluted with the pulsed clean water through the first water passing hole and then jointly output from the water outlet of the water spray pipe.

[0041] The second embodiment:

[0042] The structure A of the mouthwash nozzle of the pulse water flow dental irrigator of the present utility model includes a connecting pipe A2 having a water inlet A1 and a water spray pipe A4 having a water outlet A3, which are connected in sequence. A water passing sunk channel A5 is provided at one end of the water spray pipe A4 near the connecting pipe. The water inlet A1 is used to be connected to the water outlet end of the pulse water flow dental irrigator.

[0043] A protruding portion A6 is provided on the side of the water spray pipe A4 near one end of the connecting pipe A2. The protruding portion A6 can be a hemispherical shell or a cylindrical shell, etc., and it can be connected and fixed to the side of the water spray pipe A4 by threading or interference fit. An isolation cavity A8 for accommodating a mouthwash concentrate A7 is provided inside the protruding portion A6. A first water passing hole A9 (preferably only one hole, and the cross-section of the first water passing hole A9 can be circular, strip-shaped, rectangular, etc.) communicating the isolation cavity A8 with the water passing sunk channel A5 is provided on the pipe wall of the water spray pipe A4. One end of the connecting pipe A2 near the water spray pipe extends into the water passing sunk channel A5, and the depth of the connecting pipe A5 extending into the water passing sunk channel is adjustable. By adjusting the depth, it can be realized that the second water passing hole A10 provided on the pipe wall of the connecting pipe A2 is communicated with or disconnected from the first water passing hole A9.

[0044] When the connecting pipe extends into the water passing sunken hole to a first depth, that is, when the second water passing hole A10 provided on the pipe wall of the connecting pipe at this depth communicates with the first water passing hole A9, when pulsed clear water is introduced into the water inlet of the connecting pipe (the pulsed water is realized by a pulsed water dental irrigator connected to the water inlet A1, and the pulsed water flow has a frequency of 17 - 30 Hz), when the pulsed clear water is in the high - pressure wave band (the pressure of the pulsed water is in a sine - wave shape as shown in the figure), the pulsed clear water passes through the second water passing hole A10 and the first water passing hole A9 and is poured into the isolation cavity A8 to dissolve the mouthwash concentrate A7, so as to form a mouthwash concentrate in the isolation cavity A8. When the pulsed clear water is in the low - pressure wave band, the relatively high pressure in the isolation cavity A8 drives the mouthwash concentrate to pass through the first and second water passing holes and be diluted with the pulsed clear water and then jointly output from the water outlet A3 of the spray pipe; when the connecting pipe extends to other depths, even if the second water passing hole provided on the pipe wall of the connecting pipe is axially misaligned and not connected to the first water passing hole, the pulsed clear water introduced into the water inlet of the connecting pipe directly leads to the spray pipe and is output from the water outlet A3.

[0045] For the convenience of the user to adjust, there is a gear position (that is, the gear position for outputting the mixture of mouthwash and clear water) when the second water passing hole communicates with the first water passing hole between the above - mentioned spray pipe and the connecting pipe. This gear position can be that when the second water passing hole communicates with the first water passing hole, there are relatively elastic protruding pins and grooves, or relatively protruding rings and concave ring grooves between the spray pipe and the connecting pipe, so that the user can clearly know that this position is where the second water passing hole communicates with the first water passing hole when in use.

[0046] Specifically, a relatively fixed elastic cover buckle A11 is sleeved on the port of the spray pipe close to the connecting pipe. The elastic cover buckle includes a pipe section A12 and a cover plate section A13 formed integrally. An annular flange A14 is provided on the outer peripheral wall of the spray pipe. An annular groove A15 for limiting and cooperating with the annular flange is provided on the inner peripheral wall of the pipe section. The cooperation between the annular flange A14 and the annular groove A15 realizes the axial relative fixation of the spray pipe and the elastic cover buckle. During the use process, the elastic cover buckle A11 and the spray pipe A4 are equivalent to an integral component; a through - hole A16 for the connecting pipe to pass through is provided on the cover plate section A13 (the diameter of the through - hole is smaller than the diameter of the mouth end of the water passing sunken hole A5). A number of slots A17 (three slots are evenly distributed in a circumferential direction in this embodiment) are evenly distributed on the elastic cover buckle. The slots penetrate from the middle of the pipe section to the through - hole, so that the elastic cover buckle forms a number of elastic buckle plates A18 (three elastic buckle plates are evenly distributed in a circumferential direction in this embodiment) in the circumferential direction. A first annular limiting groove A19 is provided on the outer peripheral wall of the connecting pipe. One end of the elastic buckle plate A18 close to the through - hole can be buckled into the first annular limiting groove A19. When one end of the elastic buckle plate close to the through - hole is buckled into the first annular limiting groove, the second water passing hole communicates with the first water passing hole. That is, in this working state, the gear position for outputting the mixture of mouthwash and clear water is realized.

[0047] The above structural design of the elastic cover buckle A11 makes the elastic buckle plate A18 prone to a certain degree of deformation, which is more convenient to use and operate compared with the prior art contrast document, achieving the switching of the water output mode.

[0048] A second annular limiting groove A20 is provided on the outer peripheral wall of the above connecting pipe. When one end of the elastic buckle plate A18 close to the through hole is buckled into the second annular limiting groove A20, the second water passing hole and the first water passing hole are axially misaligned and not communicated, that is, in this working state, the gear for outputting clean water is realized.

[0049] For reasonable design, an inclined conical surface A21 is provided between the above first annular limiting groove and the second annular limiting groove (of course, a reverse inclined conical surface is provided on the side of the inclined conical surface A21 close to the second annular limiting groove). Through the inclined conical surface A21, it can be ensured that one end of the elastic buckle plate A18 close to the through hole will not move randomly between the first annular limiting groove and the second annular limiting groove. Only under the condition of applying an external force, one end of the elastic buckle plate A18 close to the through hole will be buckled into the first annular limiting groove or the second annular limiting groove.

[0050] To achieve single-handed operation, a convex ring A22 is provided on the side of the above connecting pipe close to the second annular limiting groove, and a fillet A23 is provided on the outer periphery of the connection position between the pipe section and the cover plate section. By providing the convex ring A22 and the fillet A23, the operator can, in the working state where one end of the elastic buckle plate A18 close to the through hole is buckled into the second annular limiting groove, insert the user's finger into the space between the cover plate section A13 and the convex ring A22 to push the elastic buckle plate A18 and the continuous spray water pipe towards the first annular limiting groove. There is also an interstice ring channel A24 into which the user's finger can be inserted between the pipe orifice of the pipe section of the elastic buckle plate A18 and the protruding part A6. By inserting the user's finger into the interstice ring channel A24, it is convenient to press and push the elastic buckle plate A18 and the spray water pipe towards the second annular limiting groove.

[0051] To achieve better sealing, a plurality of sealing rings A25 are provided on both sides of the above connecting pipe where the second water passing hole is located; the above mouthwash concentrate can be a solid block, gel or paste-like mouthwash concentrate, which is concentrated from mouthwash.

[0052] For reasonable design, the above first water passing hole is preferably a single hole and is conical in shape, with the side close to the isolation cavity being the large end. The cross-sectional area of the first water passing hole affects the replacement speed of the mouthwash concentrate. The cross-sectional area of the small end of the first water passing hole is 0.03 - 0.5 mm².

[0053] For reasonable design, a guiding convex strip A26 that cooperates with the slot is provided on the outer peripheral wall of the above connecting pipe. Through the guiding convex strip A26, the synchronous axial sliding of the elastic cover buckle and the spray water pipe can be limited and guided.

[0054] Working method of the mouthwash nozzle structure of the pulse water flusher of the present utility model: When the user needs to output diluted mouthwash at the water outlet of the spray pipe, adjust the depth of the connecting pipe extending into the water passing through hole channel. When the connecting pipe extends into the water passing through hole channel to the first depth (i.e., when the end of the elastic buckle plate close to the through hole is buckled into the first annular limiting groove), the second water passing hole provided on the pipe wall of the connecting pipe is communicated with the first water passing hole. When pulsed clean water is introduced into the water inlet of the connecting pipe, when the pulsed clean water is in the high-pressure wave band, the pulsed clean water is poured into the isolation cavity through the second water passing hole and the first water passing hole and dissolves the mouthwash concentrate to form mouthwash concentrate solution. When the pulsed clean water is in the low-pressure wave band, the relatively high pressure in the isolation cavity drives the mouthwash concentrate solution to pass through the first water passing hole and the second water passing hole and is diluted with the pulsed clean water and then jointly output from the water outlet of the spray pipe; When the user needs to output clean water at the water outlet of the spray pipe, adjust the depth of the connecting pipe extending into the water passing through hole channel (i.e., when the end of the elastic buckle plate close to the through hole is buckled into the second annular limiting groove. Of course, other positions are also possible, but with the second annular limiting groove, it is easy for the user to perceive), so that the second water passing hole provided on the pipe wall of the connecting pipe is axially misaligned and not communicated with the first water passing hole, and the pulsed clean water introduced into the water inlet of the connecting pipe directly leads to the spray pipe and is output from the water outlet.

[0055] The mouthwash nozzle structure of the pulse water flusher of the present utility model is reasonably designed, which is beneficial to switching to the output of clean water or the mixed output of mouthwash and clean water according to the use needs in view of the characteristics of the high and low changes of the pulse water pressure.

[0056] At the water inlet A1 of the connecting pipe A2 of the present utility model, a pulsed water flow oral irrigator is installed. The pulsed water flow oral irrigator includes a movement housing 100, an elastic piston 110, and a driving device. At the front end of the movement housing 100, a water outlet seat 120 with a piston cavity is provided. The elastic piston is arranged at the rear end of the water outlet seat 120. The water outlet end of the water outlet seat can be directly connected to the water inlet A1 or connected through a hose. The water outlet seat 120 is a prior art and can adopt the upper housing structure in the oral irrigator of Chinese Patent CN114668539A, or the water outlet seat structure in a desktop oral irrigator and its working method of Chinese Patent CN116549157A. The driving device includes a motor 130, a gear 140, an end face gear 150, and a connecting rod 160. The elastic piston 110 includes an annular portion 111 and a bowl-shaped deformable portion 112 that are integrally connected. A protective ring 170 is sleeved outside the bowl-shaped deformable portion. The protective ring 170 is made of a metal material, specifically stainless steel or alloy, and the elastic piston 110 is made of materials such as plastic film or silica gel film. The motor drives the bowl-shaped deformable portion of the elastic piston through the driving device, thereby realizing the water inlet and outlet of the water outlet seat. In the present utility model, a protective ring is provided on the outer periphery of the bowl-shaped deformable portion of the elastic piston, effectively protecting the elastic piston. When the bowl-shaped deformable portion is pushed forward and bulges outwards, it will only contact the protective ring and will not touch the movement housing. Since the inner wall of the protective ring is smooth and uniform, it can ensure that the bowl-shaped deformable portion is uniformly stressed throughout the circumference, is not easily worn, and thus extends the service life.

[0057] In this embodiment, a limiting hole 111 adapted to the annular portion of the elastic piston 110 is provided at the front end of the movement housing 100. A limiting hole step 112 that abuts against the rear end face of the annular portion of the elastic piston is provided in the limiting hole. The outer peripheral portion of the protective ring is in a stepped shape with a large diameter and a small diameter. The large diameter section of the protective ring is located in front of the limiting hole step and is clamped into an annular cavity 113 formed between the rear end portion of the annular portion and the edge portion of the bowl-shaped deformable portion. The small diameter section of the protective ring is located in the middle of the limiting hole step, and thus blocks between the bowl-shaped deformable portion of the elastic piston and the limiting hole step 112. The limiting hole step 112 can also effectively limit the protective ring and prevent it from falling off.

[0058] In this embodiment, an eccentric wheel 152 is provided on the end face gear 150. A slot hole 161 that cooperates with the eccentric wheel is provided at the rear end of the connecting rod. A wear-resistant lining plate 180 is provided between the eccentric wheel 151 and the inner wall of the slot hole 161. By providing the wear-resistant lining plate in contact with the eccentric wheel, direct contact between the inner wall of the slot hole and the eccentric wheel can be avoided, the wear of the inner wall of the slot hole can be reduced, and the situation where the connecting rod cannot work stably or the movement stroke is not in place due to wear and the resulting gap can be avoided.

[0059] In this embodiment, the slot hole 161 is a long slot hole and its length direction is perpendicular to the axis of the elastic piston. The two ends of the slot hole in the length direction leave space for the eccentric wheel to swing left and right so that the eccentric wheel drives the connecting rod to reciprocate forward and backward when the end gear rotates. The front end of the connecting rod is provided with a clamping joint part, and the middle part of the rear end of the elastic piston is provided with a slot hole that is engaged with the clamping joint part, thereby realizing the connection between the connecting rod and the elastic piston. Since the slot hole is a long slot hole structure, the swinging movement of the eccentric wheel in the left and right direction will not drive the connecting rod to swing left and right, and only the swinging movement in the up and down direction will drive the connecting rod to move forward and backward, ensuring that the connecting rod only moves in the forward and backward direction without swinging left and right, thereby preventing the connection part between the connecting rod and the elastic piston from loosening.

[0060] In this embodiment, the wear-resistant lining 180 is in an inverted U shape and is embedded in the slot 161. The side plates on both sides of the wear-resistant lining are blocked between the eccentric wheel and the long sides of the slot. A guide long hole 181 that slides with the gear shaft of the end gear is opened on the top of the wear-resistant lining. The length direction of the guide long hole 181 is parallel to the axial center line of the elastic piston. By opening the guide long hole 181 that cooperates with the gear shaft on the wear-resistant lining, the forward and backward movement of the connecting rod can be guided to ensure that the connecting rod can stably perform reciprocating linear motion in the forward and backward directions without causing left and right deviation. At the same time, the guide long hole 181 is not easy to wear, ensuring the guiding effect of stable length.

[0061] In this embodiment, the rear end of the connecting rod 160 is provided with a buckle cover portion 162 covering the eccentric wheel, the slot hole 161 is located on the lower side of the buckle cover portion 162, and the upper side of the buckle cover portion is provided with a clearance hole 163 which is connected with the slot hole and is located above the guide long hole, and the upper end of the gear shaft of the end face gear passes through the clearance hole 163, and the length direction of the clearance hole 163 is also parallel to the axial center line of the elastic piston, and the width and length of the clearance hole 163 can be slightly larger than the guide long hole 181.

[0062] In this embodiment, the top and bottom of the movement shell 100 are respectively provided with limiting slots that rotate with the end of the gear shaft 151 of the end gear. A wear-resistant sleeve 190 is embedded in the limiting slot. The wear-resistant sleeve 190 is made of copper. By providing the wear-resistant sleeve, the limiting slot of the movement shell can be prevented from being worn, thereby ensuring the long-term and stable operation of the gear shaft of the end gear.

[0063] For any of the technical solutions disclosed by the present utility model, unless otherwise stated, if it discloses a numerical range, the disclosed numerical range is a preferred numerical range. Any person skilled in the art should understand that the preferred numerical range is only the numerical values with obvious technical effects or representativeness among many implementable numerical values. Since there are too many numerical values to list them all, the present utility model only discloses some numerical values to illustrate the technical solutions of the present utility model. Moreover, the listed numerical values should not constitute a limitation on the protection scope of the present utility model.

[0064] If the present utility model discloses or involves components or structural members that are fixedly connected to each other, then, unless otherwise stated, the fixed connection can be understood as: a detachable fixed connection (for example, connected using bolts or screws), or can also be understood as: a non-detachable fixed connection (for example, riveting, welding). Of course, the mutual fixed connection can also be replaced by an integral structure (for example, manufactured by integral forming using a casting process) (except when it is obviously impossible to use the integral forming process).

[0065] In addition, for any of the technical solutions disclosed by the present utility model, the terms used to represent the positional relationship or shape, unless otherwise stated, include states or shapes that are approximate, similar, or close to them.

[0066] Any component provided by the present utility model can either be assembled from multiple separate components or be a single component manufactured by an integral forming process.

[0067] The above description is only a preferred embodiment of the present utility model and does not impose other forms of limitations on the present utility model. Any person skilled in the art may use the disclosed technical content to make changes or modifications into equivalent embodiments with equivalent changes. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution content of the present utility model still fall within the protection scope of the technical solution of the present utility model.

Claims

1. The structure of a mouthwash nozzle for a pulsed water dental irrigator, characterized in that: It includes a water spray pipe with a water inlet end and a water outlet end. There is a protruding part on the side of the water spray pipe near the water inlet end. An isolation cavity for accommodating a concentrated mouthwash body is provided inside the protruding part. A first water passing hole communicating the isolation cavity with the water inlet end is provided on the pipe wall of the water spray pipe. When pulsed clean water is introduced into the water inlet end and the pulsed clean water is in the high-pressure band, the pulsed clean water is poured into the isolation cavity through the first water passing hole and dissolves the concentrated mouthwash body to form a concentrated mouthwash solution. When the pulsed clean water is in the low-pressure band, the relatively high pressure inside the isolation cavity drives the concentrated mouthwash solution to pass through the first water passing hole and be diluted with the pulsed clean water, and then the mixture is output from the water outlet of the water spray pipe together.

2. The structure of the mouthwash nozzle of the pulsed water flosser according to claim 1, characterized in that: A water passing sunken channel is provided on the water inlet end of the water spray pipe. The first end of a connecting pipe is inserted into the water passing sunken channel. The depth of the connecting pipe extending into the water passing sunken channel is adjustable. The second end of the connecting pipe has a water inlet for connecting with a pulsed water dental irrigator to introduce pulsed water. A second water passing hole is provided on the pipe wall of the connecting pipe. When the depth of the connecting pipe extending into the water passing sunken channel is different, it is used to realize the connection or disconnection between the second water passing hole provided on the pipe wall of the connecting pipe and the first water passing hole.

3. The structure of the mouthwash nozzle of the pulsed water flosser according to claim 1 or 2, characterized in that: There is a gear position when the second water passing hole and the first water passing hole are connected between the water spray pipe and the connecting pipe.

4. The structure of the mouthwash nozzle of the pulsed water jet dental irrigator according to claim 1 or 2, characterized in that: A relatively fixed elastic cover buckle is sleeved on the port of the water spray pipe near the connecting pipe end. The elastic cover buckle includes an integrated pipe section and a cover plate section. An annular flange is provided on the outer peripheral wall of the water spray pipe. An annular groove for limiting and cooperating with the annular flange is provided on the inner peripheral wall of the pipe section. The cooperation between the annular flange and the annular groove realizes the axial relative fixation between the water spray pipe and the elastic cover buckle.

5. The structure of the mouthwash nozzle of the pulsed water jet dental irrigator according to claim 4, characterized in that: A through hole for the connecting pipe to pass through is provided on the cover plate section. A number of slotted openings are evenly distributed on the elastic cover buckle. The slotted openings penetrate from the middle of the pipe section to the through hole all the way, so that a number of elastic buckle plates are formed on the elastic cover buckle in the circumferential direction. A first annular limiting groove is provided on the outer peripheral wall of the connecting pipe. One end of the elastic buckle plate close to the through hole can be buckled into the first annular limiting groove. When one end of the elastic buckle plate close to the through hole is buckled into the first annular limiting groove, the second water passing hole is connected to the first water passing hole.

6. The structure of the mouthwash nozzle of the pulsed water jet dental irrigator according to claim 5, characterized in that: A second annular limiting groove is provided on the outer peripheral wall of the connecting pipe. When one end of the elastic buckle plate close to the through hole is buckled into the second annular limiting groove, the second water passing hole and the first water passing hole are axially misaligned and not connected; an inclined conical surface is provided between the first annular limiting groove and the second annular limiting groove.

7. The structure of the mouthwash nozzle of the pulsed water jet dental irrigator according to claim 4, characterized in that: A convex ring is provided on the side of the connecting pipe near the second annular limiting groove. A fillet is provided on the outer periphery of the connection position between the pipe section and the cover plate section.

8. The structure of the mouthwash nozzle of the pulsed water jet dental irrigator according to claim 7, characterized in that: There is also a clearance annular channel into which the user's finger can be inserted between the pipe orifice of the pipe section of the elastic buckle plate and the protruding part.

9. The structure of the mouthwash nozzle of the pulsed water jet dental irrigator according to claim 2, wherein: A number of sealing rings are provided on both sides of the connecting pipe where the second water passing hole is located; the concentrated mouthwash body is a block-shaped, gel-shaped or paste-shaped concentrated mouthwash body; the first water passing hole is a single hole and is conical in shape, and the side close to the isolation cavity is the large end.

10. The structure of the mouthwash nozzle of the pulsed water flosser according to claim 4, wherein: Guide convex strips cooperating with the slotted openings are provided on the outer peripheral wall of the connecting pipe to limit and guide the synchronous axial sliding of the elastic cover buckle and the water spray pipe.

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